Michel marcil



(No Model.)

M. MAROIL. FEEDING DEVICE FOR SEWING MACHINES. No. 407,298.

Patented July 16, 1889.

VIIIIIIIIIIIIll/l/lfih mlqessas.

UNITED STATES PATENT OFFICE.

MICHEL MARCIL, OF AMHERST, MASSACHUSETTS, ASSIGNOR TOTHE HILLS COMPANY,OF SAME PLACE.

FEEDING DEVICE FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 407,298, dated July 16,1889.

Application filed September 14,1888. Serial No. 285,398. (No model.)

To aZZ whom it may concern.-

Be it known that I, MICHEL MARCIL, of Amherst, county of Hampshire,State of Massachusetts, have invented an Improvement in FeedingMechanism for Sewing-Machines, of which the following description, inconnection with the accompanying drawings,is a specification, likeletters on the drawings representing like parts.

This invention has for its object to improve feeding mechanism ofsewing-machines, more especially of that class using a rotating hook andcalled a single-thread machine.

In this my invention I have provided the stud carried by the rocker withan eccentric sleeve, around which is fitted the rear end of thefeed-lever, the rotation of the said eccentric-sleeve in one or theother direction, when the length of feed-stroke is changed to alter thelength of stitch, enabling the feed-bar to be brought back always to thesame point before starting forward to feed the material.

Figure la front elevationrepresents a sufiicient portion of a feedingmechanism to enable my invention to be understood. Fig. 2 is a sectionof Fig. 1 in the line m. Fig. 3 is a partial plan view of the part shownin Fig. 1. Fig. 4 is a face view of the disk fixed to the main shaft,the latter and the screws extended through shown in section, the dottedlines around the shaft representing the hub of the disk B; and Fig. 5shows the inner face of the disk B, carrying the eccentric L, the latterbeing shown by dotted lines, the shaft, as well as the screws connectingthe disk B with the disk B, being "shown in section.

A represents a part of the frame-work of the sewing-machine S is arotating shaft, having connected to it a hub having a flanged disk B. Tothis flanged disk is connected a second flanged disk B" by bolts 6,extended loosely through slots in the disk B and entering threaded holesin the disk B. The diskB has at one side of it an eccentric L, and thedisk B may be adjusted with relation to the disk B by loosening thebolts 6 and partially rotating or moving the disk B, to place theeccentric referred to more or less out of center with relation to thecenter of the shaft S when it is desired United States Patent No.245,781, wherein the said parts are designated by like letters.

The eccentric referred to and marked L, (shown partially in Fig. 3,) bybreaking out the inner end of the link 0, serves in its rotation toreciprocate the said link, so that it, surrounding the stud 0, supportedat the upper end of the rocker-frame C pivoted at vibrates the said studand rockerframe, the extent of vibration of the frame and the length ofthe stitch depending upon the position of the eccentric L with relationto the shaft S. Upon the outer end of the stud C (see Fig. 2) I haveplaced the eccentric-sleeve D, it having an irregular and, as hereinshown, a hexagonal head D, which may be readily engaged and turned by awrench, the said sleeve being held in an adjusted position by a setscrewD The inner end of the feed-bar E, of usual construction and providedwith usual feedpoints 2, is provided with a split hub, which embracesthe eccentric sleeve D. The forked front end of the feed-bar receivesbetween its arms a sliding block G, within which is the eccentric T onthe shaft S, which eccentric raises and lowers the feed.

WVere it not for the eccentric-sleeve D, the feed-bar E, moved backwardand forward through the eccentric L and link 0, would be moved back fora different distance with each different adjustment of the disk B andits eccentric, so that it would not always start from the same pointwhen the feed was to take place; but by interposing the eccentricsleevebetween the studs C and the hub of the feed-bar E it is possible, by arotation of the sleeve in one or the other direction'after anyadjustment of the disk B" and eccentric, to always insure that thefeed-bar be moved back to a certain definite point, so as to alwaysstart forward from the same point no matter what the length of thefeed-stroke,

that being deteimined, as stated, by the position of the eccentric L.

I do not claim the feed-bar nor the link C, nor the means for moving thelink and vibrating the rocker O for agrcater or less distance, accordingto the length of stitch desired.

I claim 1. The combination, with the shaft S, an adjustable eccentricactuated by it, the rocker, the stud, and connections between the saideccentric and rocker to vibrate the latter, of

the feedbar and the eccentricsleeve interposed between the said stud andthe hub of the feed-bar, to operate substantially as described.

2. The combination, with the shaft S, an ad \Vi tnesses:

\V. A. DICKINSON, R. G. SHAW.

